Easy LPFM Radio Licensing
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NT 2500 – 2.5kW

Phase Locked Loop Programmable
FM Exciter/Transmitter 87.5 – 108 MHz Range


  • Includes low pass/harmonic filter and can be used as a stand-alone transmitter
  • Instant front panel programmability in 10 kHz increments
  • All functions via LCD password protected
  • Adjustable power output from 10 to 2500 W with automatic power control
  • Remote control features (optional) include: power on/off, fwd & ref power metering, ability to change frequency and Internal temperature metering
  • Telemetry Output and FSK-ID Keyer (optional)



  • Rated Output Power: 10-2500 Watts continuously variable (ALC)
  • RF Output Connector: 7/8 EIA Flange
  • RF Output Impedance: 50 ohm
  • Frequency Range: 87.5 MHz to 108 MHz
  • Frequency Programmability: direct from front panel in 10 kHz increments
  • Frequency Stability: better than 5 ppm (± 500 Hz)
  • Modulation Type: direct carrier frequency modulation
  • Emission class: F3E
  • Spurious & Harmonic Suppression: < – 80 dB or better
  • Stereo Separation: 55 dB @ 1 Khz
  • Distortion: < 0.1 % (typ. 0.05 %)
  • Asynchronous AM S/N Ratio: 65 dB below reference carrier with 100%amplitude modulation at 400Hz
  • without de-emphasis, no FM modulation present
  • Synchronous AM S/N Ratio: 60 dB or better below reference carrier with 100% amplitude modulation at 400 Hz, without de-emphasis, FM modulation = ±75 kHz at 400 Hz
  • AC Power Requirement: 220-240 VAC, ±10%, 50-60 Hz, single phase (Internally Selectable)
  • Power Consumption: approx. 3500 W from AC
  • Panel Size: 483 mm (19″) W x 132 mm (5″) H (3 standard rack spaces high)
  • Overall Depth:  540 mm (21″)
  • Weight: 20 Kg (45 Lbs)
  • Ambient Temperature Range: 0° to 50° C (32° to 122° F)
  • Pre-emphasis: for FCC 75 μsec; for CCIR 50 μsec internally selectable
  • Composite Operation
  • Composite Inputs: four total, 1 for MPX and 3 for SCA
  • MPX Input: 1 unbalanced BNC connector
  • MPX Input Impedance: 2k ohm
  • MPX Input Level: 3.5 Vp-p (1.237 Vrms/3.64 dBm)
  • Composite FM unweighed S/N ratio: >68 dB below ±75 kHz deviation at 400 Hz measured in a
  • 30 Hz to 100 kHz bandwidth with 75 μsec de-emphasis (RMS)
  • Composite Total Harmonic Distortion: 0.05% typical
  • Composite Intermodulation Distortion: 0.05%, measured with a 1 kHz and a 1.3 kHz tone, 1:1 ratio, at 100% modulation
  • Baseband: 30 Hz – 60 Khz within 0.15 dB
  • Crosstalk: Main to stereo subchannel and stereo subchannel to main >55 dB (60 dB typical)
  • SCA Inputs: 3 unbalanced BNC connectors
  • SCA Input Impedance: 10k ohm
  • SCA Input Levels: 0 dBm (775 mVrms/2.2 Vp-p) nominal for ±7.5 kHz deviation, adjustable
  • SCA Amplitude Response: ±0.8 dB, 40 kHz to 100 kHz
  • Crosstalk: 67 kHz SCA to main or to stereo subchannel >65 dB
  • Crosstalk: 92 kHz SCA to main or to stereo subchannel >70 dB
  • Monaural Operation
  • Audio Input Impedance: 600 ohm balanced or unbalanced; 50 dB common mode suppression
  • Audio Input Level: 0 dBm (775 mVrms/2.2 Vp-p) for ±75 kHz, adjustable
  • FM S/N Ratio: >70 dB below ±75 kHz, deviation at 400 Hz measured in a 30 Hz to 20 kHz bandwidth with 75 μsec de-emphasis (RMS)
  • Audio Frequency Response: ±0.8 dB, 30 Hz to 15 kHz
  • lntermodulation Distortion: 0.05% or less, measured with a 1 kHz and a 1.3 kHz tone, 1:1 ratio, at 100% modulation

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